Recent reviews by [MTDR]Jihyo_D_Tank Engine

replayability and huge lore

Very Enjoyable.
It almost gives the same feeling as L4D2, but lacks the 'scary-horror' segments of encountering a witch in l4d/l4d2.
But WWZ has its edge of having more multiple ways of tackling the game. and Better Replayability, courtesy of getting your arsenal improved as you progress with the game

TBH, WWZ is a better successor to L4D than B4B.
WWZ follows a similar format to L4D in which a region is cut into smaller events and ends with an epic finale map.
B4B just doesnt have that same epic value in their finale, which WWZ does well

Gameplay: 9/10
Story: 6-7ish/10
Replayability: 9/10

In Summary, L4D2>WWZ>B4B